Colibrys Sa

Csem Centre Suisse D'electronique Et De Microtechnique Sa

Csem Centre Suisse D'electronique Et De Microtechniques Sa — Recherche Et Développement

Csem Centre Suisse D'electronique Et De Microtechnique Sa&#x2014;recherche Et D&#xe9;veloppement

Claude Bourgeois

David Ruffieux

Felix Rudolf

André Perret

Appolonius Van Der Wiel

Patrick Debergh

Carsten Underbjerg

Arnold Christiaan Hoogerwerf

Stephan Gonseth

Marc-Alexandre Dubois

Gr&eacute;goire Perregaux

Jacek Baborowski

The invention relates to mechanical watch oscillators comprising an assembly consisting of a spiral and a temperature compensated balance. The spiral is embodied in a quartz substrate whose section is selected in such a way that the drifts of the spiral and of the balance associated therewith are thermally compensated. The substrate section can be embodied in the form of a section of single or double rotation.

Temperature-compensated balance wheel/hairspring oscillator

The invention relates mainly to a hairspring intended to equip the balance wheel of a mechanical timepiece. It is in the form of a spiraled rod () cut from an {001} single-crystal silicon plate. Its structure and its dimensions are calculated so as to minimize the thermal drift of the hairspring/balance-wheel assembly by means of the first and second thermal coefficients of its spring constant.

Watch hairspring and method for making same

This switching device comprises at least one cell made up of a moving structure consisting in a flexible cantilever beam ( ) and an integral screen ( ) attached to said beam, being able to move between two end positions (A, B) and of actuating electrodes ( ) for subjecting said structure to forces of attraction to control its movements. The electrodes ( ) are located on each side of the beam ( ) in such a way as to follow its exact shape when it is in one of its two end positions. A regular movement of the moving structure and a reliable operating of the switching device are thus obtained This invention may be used in optical switching applications.

Switching device, particularly for optical switching

Switching device, in particular for optical applications

Growing community of inventors

Bôle, Switzerland

Claude Bourgeois